| Chrono Quest | 17世紀第4期 |
| Offer Method | Celestial Discovery without map |
| Difficulty | 10 |
| Time Limit | none |
| Town | There are no Towns available for offers. |
| Required Skills | Astronomy (10), Visibility (10) |
| Discovery | Astronomy / Iapetus (4th period of the 17th century) Saturn's largest satellite after Titan and Rhea. The surface is clearly divided into bright and dark areas, making it difficult to observe depending on the situation. Found in the Ligurian Sea. When discovered, visibility skill and Astronomy science skill are both 10. Rank: 4, Points: 8, Difficulty: 10, Experience Points: 800 |
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| Notes | Discovered in the Ligurian Sea in the 17th century-4. Required Skills are skill levels at the time of discovery, so the exact Required Skills levels are unknown. I failed with R6+3 and succeeded with R6+4, so I decided on R10. |